Citigroup, the US banking giant, has named John Dugan as chairman.
He replaces Mike O'Neill who has reached retirement age and was due to leave in April.
Mr Dugan was already a director of the bank and is a former regulator.
Citigroup - unlike some other US banks - separates the role of chief executive and chairman. The chief executive is Mike Corbat who said "Citi and our shareholders have been well served by having an independent chairman".
Mr O'Neill was briefly chief executive of Barclays.